Annealing furnace is mainly used for continuous softening of austenitic stainless steel, nickel alloy, precision alloy, etc. and bright annealing of soft finished products, intermediate recrystallization annealing, final annealing and stress relief treatment of various copper materials and copper alloys. Steel strips, steel knives, small mechanical parts, etc. are subjected to non-oxidative heating at high temperatures, sintering of powder metallurgy, annealing of magnetic materials, and certain small metal parts, such as watch cases, watch bands, annealing in the kitchenware industry, quenching, and stainless steel Bright annealing, especially quenching of Cr13 stainless steel, stainless steel solid solution treatment, etc. Ideal continuous sintering / annealing process under protective atmosphere conditions. The production line has the characteristics of advanced control, remarkable rhythm and easy maintenance. Stepless speed regulation of high-temperature resistant metal mesh belt for workpiece conveying. The entire heating zone adopts PID non-contact automatic power adjustment control, multi-zone temperature control, and the protective gas source uses an ammonia decomposition furnace with a gas purification device.